* François Godin ([email protected]) wrote: > Thank for the answer. That made it clear but it bring others questions : > > Is the state for the "page_fault_entry" event is the previous state of the > cpu ? I suppose but a confirmation would be welcome.
Well, in reality, the page fault entry event is recorded in page fault context. So the textdump has it right. But that's really just a "modeling artefact" to have one or the other. > > I try to understand why on one trace, is there still "page_fault_entry" in > TRAP mode. I checked the previous correction, and while it find the right > states for all events except those that LTTv put in "TRAP" mode. Am I > missing something else or is it a glitch in LTTv? No sure what you mean. Can you try to explain a little more ? Thanks, Mathieu > > > > > 2010/7/15 Mathieu Desnoyers <[email protected]> > > > * François Godin ([email protected]) wrote: > > > I think I've found another bug in the LTTv statistics. The problem is > > with > > > page_fault_entry event. In the textdump they are classified as being in > > mode > > > TRAP but they appear in SYSCALL and USER_MODE mode in the statistics > > view. > > > > This comes from the way callbacks are dealt with in the priority hook > > list: > > > > When an event is encountered, the statistics "before" event callbacks > > are called first, then the state "before" event callbacks are called, > > then the event callbacks per se (e.g. textdump) are called, and then the > > after state, followed by after stats hooks. > > > > So given that the statistics hooks are called before the state > > modification, and that the textdump hooks are called after the state > > modification, there is a discrepancy between the two. But in reality, > > the statistic hook has the correct state associated (the trap occurs its > > calling context, not in "itself"). But how to fix the textdump is > > unclear to me. > > > > Thanks, > > > > Mathieu > > > > -- > > Mathieu Desnoyers > > Operating System Efficiency R&D Consultant > > EfficiOS Inc. > > http://www.efficios.com > > > > > > -- > François Godin -- Mathieu Desnoyers Operating System Efficiency R&D Consultant EfficiOS Inc. http://www.efficios.com _______________________________________________ ltt-dev mailing list [email protected] http://lists.casi.polymtl.ca/cgi-bin/mailman/listinfo/ltt-dev
